What is RHSA-2026:26257?

RHSA-2026:26257 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: Assisted Installer RHEL 8 components for Multicluster Engine for Kubernetes 2.8.8

Which CVE IDs does RHSA-2026:26257 cover?

RHSA-2026:26257 covers the following CVE IDs: CVE-2025-58058, CVE-2026-39883. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:26257?

RHSA-2026:26257 has a CVSS v3 base score of 8.8, published by Red Hat Product Security.

RHSA-2026:26257HighCVSS 8.8

Red Hat Security Advisory: Assisted Installer RHEL 8 components for Multicluster Engine for Kubernetes 2.8.8

Vendor

Red Hat Product Security

Published

June 16, 2026

Last Modified

June 16, 2026

🔗 CVE IDs covered (2)

CVE-2025-58058 →CVE-2026-39883 →

📋 Description

CVE-2025-58058 — github.com/ulikunitz/xz: github.com/ulikunitz/xz leaks memory CVE-2026-39883 — github.com/open-telemetry/opentelemetry-go: OpenTelemetry-Go: Arbitrary code execution via PATH hijacking on BSD/Solaris

🔗 References (5)

selfhttps://access.redhat.com/errata/RHSA-2026:26257
externalhttps://access.redhat.com/security/cve/CVE-2025-58058
externalhttps://access.redhat.com/security/cve/CVE-2026-39883
externalhttps://access.redhat.com/security/updates/classification/
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_26257.json